D3 is more declarative than jQuery, but not so much as React. selection.enter().append("div").attr("class", "bar") .style("height", function(d){ return

D3 is more declarative than jQuery, but not so much as React. selection.enter().append("div").attr("class", "bar") .style("height", function(d){ return d + "px"; }) .style(“margin-top”, function(d){ return (100 — d) + "px"; }); enter is not imperative, but what you write just afterwards is.